Air filtration device

Abstract

An air filtration device (1) of an air suction system of a vehicle engine includes a suction manifold (2) extending in length along a main axis (X-X). The air filtration device (1) further includes at least two tubular filters (3), a first tubular filter (31) and a second tubular filter (32) arranged in series along said main axis (X-X) inside the suction manifold (2). The air filtration device (1) further includes a support (4) supporting the tubular filters (3) in the suction manifold (2). The support (4) includes at least one connection element (45) which mechanically supports two consecutive tubular filters, connecting the filters fluidically. Furthermore, the support (4) includes a partialization device (41) to create an obstruction to the flow of clean air flowing inside the first inner cavity (31) to favor flow of air through the second tubular filter (32).

1 . An air filtration device of an air suction system of a vehicle engine, comprising:
 a suction manifold extending in length along a main axis between a first end comprising an outlet mouth fluidically connected to the air suction system, and a second end, comprising an inlet mouth;   at least two tubular filters housed inside said suction manifold, arranged along the main axis, comprising a first tubular filter positioned proximally to the first end, and to the outlet mouth, and a second tubular filter positioned proximal to the second end, wherein each tubular filter is traversable by air from outside to inside filtering the air by operating in parallel, respectively comprising centrally a first inner cavity defined by a first inner wall of the first tubular filter and a second inner cavity defined by a second inner wall of the second tubular filter;   a support supporting the tubular filters in the suction manifold comprising:   
       i) at least one connection element for the connection in series of two consecutive tubular filters; 
       ii) a partialization device housed in the first inner cavity to create an obstacle to flow of air flowing inside said first inner cavity in such a way as to promote the flow of air through the second tubular filter and thus through the second inner cavity. 
     
     
         2 . Air filtration device according to  claim 1 , wherein the support comprises a second partialization device housed in the second inner cavity of the second tubular filter, wherein the second partialization device creates an obstacle to the flow of air flowing inside said second inner cavity inferior to the obstacle which the first partialization device creates in the first inner cavity. 
     
     
         3 . Air filtration device according to  claim 1 , comprising at least one intermediate tubular filter positioned along the main axis between the first tubular filter and the second tubular filter, which is crossable by the air from the outside to the inside, centrally comprising an intermediate inner cavity defined by an intermediate inner wall, wherein the support comprises:
 a first connection element connecting the intermediate tubular filter to the first tubular filter;   a second connection element connecting the intermediate tubular filter to the second tubular filter.   
     
     
         4 . Air filtration device according to  claim 3 , wherein the support comprises an intermediate partialization device housed in the intermediate inner cavity to create an obstacle to the flow of air flowing inside said intermediate inner cavity in such a way as to promote the flow of air through the second tubular filter and thus through the second inner cavity. 
     
     
         5 . Air filtration device according to  claim 1 , wherein the partialization device comprises a partialization wall that extends in length occupying the respective central cavity comprising an inlet portion engaging the respective inner wall or the connection element and an outlet portion distal from the respective inner wall, defining a suction channel in which the clean air aspirated through the respective tubular filter flows. 
     
     
         6 . Air filtration device according to  claim 5 , wherein the partialization device comprises centrally an outlet passage, separated from the suction channel by the partialization wall, wherein the air filtered by the adjacent tubular filter flows towards the outlet through the outlet passage. 
     
     
         7 . Air filtration device according to  claim 1 , wherein the partialization device comprises a partialization element positioned in the inner cavity in a position proximal to the outlet of the respective inner cavity, wherein said partialization element has a substantially planar extension in a direction orthogonal to the main axis, presenting calibrated air passages. 
     
     
         8 . Air filtration device according to  claim 7 , wherein the partialization element is housed in the suction channel in its an outlet portion, having a substantially annular shape. 
     
     
         9 . Air filtration device according to  claim 7 , wherein the partialization element comprises a porous body, made of fibrous material, or comprises a perforated planar body. 
     
     
         10 . Air filtration device according to  claim 7 , wherein the partialization element is supported and at least partially housed in the connection element. 
     
     
         11 . Air filtration device according to  claim 1 , wherein the main axis extends along a single direction that is along a single straight line. 
     
     
         12 . Air filtration device according to  claim 1 , wherein the main axis extends in a plurality of directions, identifying different linear sections, wherein the connection element is configured to connect said different linear sections. 
     
     
         13 . Air filtration device according to  claim 12 , wherein each tubular filter is positioned along a respective linear section, wherein the suction manifold comprises respective manifold sections which house the respective tubular filter. 
     
     
         14 . An air suction system of a vehicle engine comprising a suction duct system fluidically connected to the vehicle engine and an air filtration device, according to  claim 1 , fluidically connected to said system suction duct, wherein the air from the external environment is aspirated through the air filtration device and is cleaned of any suspended particles to then flow in said system suction duct. 
     
     
         15 . Suction method of filtering air of an air suction system of a vehicle engine through an air filtration device according to  claim 1 , comprising the step of:
 aspirating the air from the external environment by suction and filtering the air in parallel through each tubular air filter arranged along the main axis.